Electric incandescent lamp.



J. E. BUTTER.

ELEGTRIG INCANDESOENT LAMP.

APPLIOATION TILED JUNE 18, 1912.

1,096,359, Patentd May 19, 1914.

JACOB E. PUTTER, OF ST. JOSEPH, MISSOURI.

ELECTRIC INCANDESGENT LAMP.

Specification of Letters Patent.

Application filed June 18, 1912.

.lllai'ented May the ill Serial No. 704,450.

To all 20/1 run if may come/n Be it known that I, Jason E. lliz'r'rnn, acitizen of the United States, residing at St. Joseph, in the county ofBuchanan and State of Missouri, have invented certain new and usefulllnprovements in Electric Incandescent launps, of which the follow in;is a specification.

This invention relates to an imprm 'ement in incainleseent electriclights of the tungstcn type.

The principal object of this invention is to so construct the light thatthe candle power will be greatly increased.

Another object is to so construct the light that the rays will bereflected from a series of lenses which are nnitheinatieally correct,thus insuring the light rays being reflected evenly all around the lamp.

In order to more fully describe my invention so that one skilled in theart can reproduce the device l refer to the following figures, whichdisclose the same.

Figure 1 is a side elevation of my lamp. Fig. 2 is a cross section of amodified Form. Fig. 3 is a diagrauunatieal view showing how the light isreflected evenly around the same. Fig. 4 is a cross section taken on theline m zu of Fig. 1.. Figs. 5 and (3 show modified forms of reflectors.

Like numerals designate corresponding parts throughout the several viewsof the drawing.

The numeral 5 designates the usual lamp bulb attached to a plug 6. It iscustomary in tungsten lights to provide a support for the filament whichis ver fragile. This is usually a glass rod having wire supports sealednear the plug and near the extreme end. From these wires the tungstenfilament is supported. In my lamp I replace this glass rod with areflector.

I am aware that it is old to place rcfiectors within incandescentelectric light bulbs but I do not believe that a reflector of thecharacter I am about to describe has ever been used. [1 e usual scalingin tube 7 is einplloyed; to this is attached my reflector 8, the samehas a multiplicity of sides which are eonstrueled upon a paraboliccurve. These curred faces are molded with loatheinat accuracy. (in thelower earl of my relh is a projection .l which carries snp {)(ll'tlllg'rods 1U. 'l here are eorlmponding supporting rods 10' atlhe top andbetween these the lilament ll is stretched but instead of running;-diagonally as in the ordinary lamp it is so wired that it runsvertically in parallelism with the relleclor and at a1)l0(l(3t(.llllilll.(l distance ll'ieirl'roni. This distance being thefocus for the curved surface.

Referring to Fig. 2 I show a modified form of lamp which has a reflectorformed integral with the globe proper. The re doctor is merely acontiiuultiiin of the bulb 5 turned back within itself at .12 so as toform the reflector 123. 'lhis reflector may have sides of varying;number. The supports in this instanwa are in the form of rings and arecarried by both ends of the reflector 14 and 1-1 and filament 1T3-stretched between and so wired as to run vertically and in parallelismwith the face of the relleetor. 'lhe insideof the reflector-l3 may beeither s'ilvcred or a silver tube may he placed within the cavity tocause the rcileetion.

Having described my invention ".vi'lat I claim is:-

1. An incandescent lamp comprising: a

vacuum bulb, a tubular member supporter in the center of the bulb, andformed of uniform cross section and also termed wilh a plurality ofreflecting surfaces. ring filament supports secured to the tnhulawmember near its upper and lower ends, and a filament Slli')]7(llt9(l on thering supports and having portions extending in parallelism with each ofthe reflecting surfaces and disposed medially ll'iereof, 2. An articleof inanufaeturqeonsistin o a vacuum bulb having a tubular mean or formedon its lower end and extending in wardly toward the neck of the bulb,the up per end of said tubular member being closed and the bulb neckhaving an inwardly drawn sleeve sum-molding the closed end of the emmatubular; member, said tubular member being In testimony whereof I affixmy signature shaped t0 provlde a lurahty of concave re- 1n presence oftwo wltnesses.'

n l 1 j fleeting surfaces, and a filament suppoxtefi JACOB E PUTTER onthe tubulavr member and having its ter- 5 minal portiaiis extendedthrough the neck Witnesses:

bet-Ween the-sleeve and the closed enmi of the L. 30222011,

aubula'r member. BENNETT JONES

